The search term was formatted into LOWER(%s) and passed as the *value* of the
LIKE, so the function name ended up inside the pattern:
slug_name LIKE '%LOWER(coco)%'
That can never match. Only the display_name clause did any work, and LIKE is
case-sensitive on Postgres, so searching a tag by the name it is written in
returns nothing:
slug_name=Coco -> matches
slug_name=coco -> no match
Tags are lower case by convention, so lower case is what users type, and the
filter appears to report that no such tag exists.
Lower both sides instead. The term normalisation is extracted so it can be
covered by a test without a database.
Max Engine
4488ccc689